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Thread: Mazak humming servo at idle

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  1. 01-20-2017, 03:28 PM #1
    gusf
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    Mazak humming servo at idle

    Hi,

    i have a new to me Mazak VTC20B -96 with Mazatrol M plus control.

    Servos: HA83NC-S
    Drives: MDS-B-V1-10 and MDS-B-V2-1010 (dont know which one controls what)

    occasionally my X axis servo starts humming when motion stops, it will go away after 10-15 secs or instantly if i move the axis again. Load % goes up when humming occours.

    Normally at idle my X load is 4-6% higher than the Y axis.

    Any advise on what to check?

    Thanks

    Gustav
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  2. 01-20-2017, 03:35 PM #2
    mazak-user
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    Re: Mazak humming servo at idle

    Hi, look in your electric book, which servo is for X Y and Z? Or give a picture of the electric cabinet.

    MAZAK Service, [email protected]
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  3. 01-20-2017, 03:42 PM #3
    gusf
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    Wow, thanks for fast reply.

    Checked again an x amp is MDS-A-V1-10


    Quote Originally Posted by mazak-user View Post
    Hi, look in your electric book, which servo is for X Y and Z? Or give a picture of the electric cabinet.

    MAZAK Service, [email protected]
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  4. 01-20-2017, 03:45 PM #4
    mazak-user
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    Re: Mazak humming servo at idle

    Ok, what alarm code you get on this servo?

    MAZAK Service, [email protected]
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  5. 01-20-2017, 03:55 PM #5
    mazak-user
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    Re: Mazak humming servo at idle

    Click image for larger version.  Name: SmartSelectImage_2017-01-20-15-54-45.jpg  Views: 0  Size: 59.1 KB  ID: 347252

    MAZAK Service, [email protected]
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  6. 01-20-2017, 04:44 PM #6
    gusf
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    I get no alarm, just the humming.



    Quote Originally Posted by mazak-user View Post
    Ok, what alarm code you get on this servo?

    MAZAK Service, [email protected]
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  7. 01-20-2017, 05:50 PM #7
    mazak-user
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    Re: Mazak humming servo at idle

    Quote Originally Posted by gusf View Post
    I get no alarm, just the humming.
    Are you able to look at the machine parameters?

    MAZAK Service, [email protected]
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  8. 01-20-2017, 05:54 PM #8
    gusf
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    Re: Mazak humming servo at idle

    Yes!


    Quote Originally Posted by mazak-user View Post
    Are you able to look at the machine parameters?

    MAZAK Service, [email protected]
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  9. 01-20-2017, 05:59 PM #9
    mazak-user
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    Re: Mazak humming servo at idle

    Quote Originally Posted by gusf View Post
    Yes!
    Ok please find the SV parameter.

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  10. 01-20-2017, 07:20 PM #10
    gusf
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    Attaching pics

    Quote Originally Posted by mazak-user View Post
    Ok please find the SV parameter.

    MAZAK Service, [email protected]
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  11. 01-20-2017, 08:04 PM #11
    mazak-user
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    Re: Mazak humming servo at idle

    Ok, try to change SV38 on X-axis down from 150 to 100 or 70. Get it better?

    MAZAK Service, [email protected]
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  12. 01-20-2017, 08:41 PM #12
    gusf
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    Will try tomorrow.

    Notch filter, can you explain what it does?

    Thank you!

    Quote Originally Posted by mazak-user View Post
    Ok, try to change SV38 on X-axis down from 150 to 100 or 70. Get it better?

    MAZAK Service, [email protected]
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  13. 01-20-2017, 08:50 PM #13
    mazak-user
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    Re: Mazak humming servo at idle

    Try it

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  14. 01-21-2017, 08:23 PM #14
    underthetire
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    Re: Mazak humming servo at idle

    Check lubrication, then thrust bearings. You may need servo tuning, but that is a waste of time unless the mechanicals are good.

    Sent from my SM-T813 using Tapatalk
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